diff -ru RelativeLink/start-tor-browser RelativeLinkNamecoin/start-tor-browser
--- RelativeLink/start-tor-browser	2020-06-09 11:15:59.000000000 +0000
+++ RelativeLinkNamecoin/start-tor-browser	2020-08-04 03:03:02.316000000 +0000
@@ -355,6 +355,16 @@
 #
 # The --class parameter was added to fix bug 11102.
 
+# The Namecoin support in this script is a placeholder proof-of-concept only.
+# In the real world this would be moved to Tor Launcher.
+if [ "${TOR_ENABLE_NAMECOIN}" = 1 ]; then
+    python3 -c 'import sys; exit(0) if sys.version_info[:2] >= (3, 6) else exit(1)'
+    if [ "$?" -ne 0 ]; then
+        complain "Namecoin requires at least Python 3.6."
+        exit 1
+    fi
+fi
+
 if [ "$show_usage" -eq 1 ]; then
     # Display Firefox help, then our help
     TOR_CONTROL_PASSWD=${TOR_CONTROL_PASSWD} ./firefox --class "Tor Browser" \
